retroarch: include dosbox-pure core

pkgs/applications/emulators/retroarch/cores.nix

@@ -360,6 +360,17 @@ in
     };
   };
 
+  dosbox-pure = mkLibretroCore {
+    core = "dosbox-pure";
+    CXXFLAGS = "-std=gnu++11";
+    hardeningDisable = [ "format" ];
+    makefile = "Makefile";
+    meta = {
+      description = "Port of DOSBox to libretro aiming for simplicity and ease of use.";
+      license = lib.licenses.gpl2Only;
+    };
+  };
+
   eightyone = mkLibretroCore {
     core = "81";
     src = getCoreSrc "eightyone";

pkgs/applications/emulators/retroarch/hashes.json

@@ -144,6 +144,12 @@
         "rev": "b7b24262c282c0caef2368c87323ff8c381b3102",
         "hash": "sha256-PG2eElenlEpu0U/NIh53p0uLqewnEdaq6Aoak5E1P3I="
     },
+    "dosbox-pure": {
+        "owner": "schellingb",
+        "repo": "dosbox-pure",
+        "rev": "035e01e43623f83a9e71f362364fd74091379455",
+        "hash": "sha256-j7Or4yTK5l+ZVC5UFeym9sLx+88PRlofoBT1tMuf31A="
+    },
     "eightyone": {
         "owner": "libretro",
         "repo": "81-libretro",

pkgs/applications/emulators/retroarch/update_cores.py

@@ -36,6 +36,7 @@ CORES = {
     "desmume2015": {"repo": "desmume2015"},
     "dolphin": {"repo": "dolphin"},
     "dosbox": {"repo": "dosbox-libretro"},
+    "dosbox-pure": {"repo": "dosbox-pure", "owner": "schellingb"},
     "eightyone": {"repo": "81-libretro"},
     "fbalpha2012": {"repo": "fbalpha2012"},
     "fbneo": {"repo": "fbneo"},